Crushing Blow: The 57th Exterior Scouting Mission (5) Shingeki no Kyojin : Season 1 Episode 21

After a last act of desperation, the person inside the Female Titan has escaped from the Recon Corps and reverted to their human form. Now, disguised as a member of the Recon Corps and equipped with Maneuver Gear, they finally catch up to their prey — Levi's squad.